文件操作 - useViewRange.ts
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文件: /usr/share/grafana/public/app/features/explore/TraceView/useViewRange.ts
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import { useCallback, useState } from 'react'; import { ViewRangeTimeUpdate, ViewRange } from '@jaegertracing/jaeger-ui-components'; /** * Controls state of the zoom function that can be used through minimap in header or on the timeline. ViewRange contains * state not only for current range that is showing but range that is currently being selected by the user. */ export function useViewRange() { const [viewRange, setViewRange] = useState<ViewRange>({ time: { current: [0, 1], }, }); const updateNextViewRangeTime = useCallback(function updateNextViewRangeTime(update: ViewRangeTimeUpdate) { setViewRange( (prevRange): ViewRange => { const time = { ...prevRange.time, ...update }; return { ...prevRange, time }; } ); }, []); const updateViewRangeTime = useCallback(function updateViewRangeTime(start: number, end: number) { const current: [number, number] = [start, end]; const time = { current }; setViewRange( (prevRange): ViewRange => { return { ...prevRange, time }; } ); }, []); return { viewRange, updateViewRangeTime, updateNextViewRangeTime }; }
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